Question
Speed of current is equal to 35% of speed of boat in
still water. If the boat takes 7 hours to cover 140 km in still water, then find the time taken by the boat to cover 91 km in upstream.Solution
Speed of the boat in still water = 140 ÷ 7 = 20 km/h Speed of current = 20 × 0.35 = 7 km/h Therefore, upstream speed of the boat = 20 – 7 = 13 km/hr Required time taken = 91 ÷ 13 = 7 hours
If '+' means ' - ', ' X ' means '+', ' - ' means '÷' and '÷' means ' X ', then what is the value of the following expression?
112 - 4 + 65 X 22...
If '%' means (+), '#' means ( - ), '@' means ( X ), and '&' means (÷), then what is the value of the expression:
80 % 110 & 5 @ 9 # 104
If ‘÷’ means ‘-’, ‘-’ mean ‘+’, ‘+’ means ‘×’ and ‘×’ means ‘÷’, compute the value of the expression:
130 × ...
Which two signs need to be interchanged to make the following equation correct?
62 – 12 × 60 ÷ 12 + 30 = 92
If in a certain code language ‘+’ represents ‘×’, ‘–’ represents ‘+’, ‘×’ represents ‘÷’ and ‘÷’ represents ‘–’....
If '+' means '-', ' X ' means '+', '-' means '÷' and '÷' means ' X ', then what is the value of the following expression?
91 - 7 X 18 ÷ 5 + 10...
If '>' means 'Addition', '$' means 'Divide', '<' means 'Subtract', '%' means Multiply', Then '' 54 > 32 $ 8 < 6 % 5 ' = (?)
Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.
56 * 492 * 6 * 7 * 123 = 507
If x stands for ‘addition’, ÷ stands for ‘subtraction’, + stands for ‘multiplication’, and – stands for ‘division’, then 90 x 85 – ...
If the word 'EXAMINATION' is arranged in alphabetical order from the right end, then which of the following letter will be the fourth letter to the righ...
Relevant for Exams:
